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SHINY RUNJS JQUERY EXAMPLE HOW TO

Either use this input value as part of your reactive expressions, output renderers, and observers or use observeEvent(input$foo, shinyApp ( ui, server ) While this is normally done using an input binding, you can skip all the ceremony and directly send a reactive input value to R with this JavaScript function:įor example, tInputValue("foo", "bar") will cause the server’s input$foo to be set to "bar". From JavaScript to RĬommunication from JavaScript to R works by setting a reactive input. See this article to learn about your options for doing that.

SHINY RUNJS JQUERY EXAMPLE HOW TO

In both cases, you’ll also need to know how to package your JavaScript code with your Shiny app.

How to communicate from R to JavaScript.

How to communicate from JavaScript to R.

In these cases, you can skip the machinery around input/output bindings, and more or less directly send messages back and forth between JavaScript and R. For example, binding keyboard shortcuts on the web page to R functions on the server, or alerting R when the size of the browser window has changed.

You have some client JavaScript that isn’t related to any particular input, yet wants to trigger some behavior in R.

You want the server to update a specific (custom) output on the client, but not by totally invalidating the output and replacing the value, just making a targeted modification.

You want the server to trigger logic on the client that doesn’t naturally relate to any single output.Inputs send values from the client to the server, and when the server has values for the client to display, they are received and rendered by outputs.īut sometimes, you may want some custom behavior in JavaScript that isn’t a natural fit for a custom input or output binding. Shiny was designed with an emphasis on distinct input and output components in the UI.